The radiation patterns of an elastic wave field generated by circular plane compressional
and shear transducers are derived using the method of steepest descent. These patterns
contain both effects of the elastic half ...

A useful approach to optimal seismic survey design is to simulate the seismic response
for a suite of a priori subsurface models and shot-receiver templates. The response can
be used to evaluate many criteria such as ...

The control of spatially distributed systems is often complicated by significant uncertainty about system inputs, both time-varying exogenous inputs and time-invariant parameters. Spatial variations of uncertain parameters ...

As more resources are directed toward reverse-time migration an accurate velocity
model, including strong reflectors, is necessary to form a clear image of the subsurface.
This is of particular importance in the vicinity ...

We describe a new short cut strategy to image the sediments and salt edge around a salt
flank through an overburden salt canopy. We demonstrate its performance and capabilities on a
synthetic acoustic seismic data from ...

Horizontal transverse isotropy (HTI) is the simplest azimuthally anisotropic model used
to describe vertical fracturing in an isotropic matrix. Using the elliptical variation of
P-wave normal-moveout (NMO) velocity with ...

Parameter estimation from elliptical variations in the normal-moveout (NMO) velocity
in azimuthally anisotropic media is sensitive to the angular separation between the
survey lines in 2D, or equivalently source-to-receiver ...

Full waveform inversion with frequency sweeping cannot start from zero frequency because of the lack of low-frequency data, requiring a good starting model. We study a di fferent iterative scheme where the notion of proximity ...

This report contains the results of work completed during the ninth year of the Full
Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at M.LT.
During the past year, we have started the evolution ...

This report contains the results of work completed during the twelfth year of the Borehole Acoustics and Logging Consortium in the Earth Resources Laboratory at M.LT.
This year we have achieved one of our major goals in ...

This report contains the results of work completed during the tenth year of the Borehole
Acoustics and Logging Consortium in the Earth Resources Laboratory at M.l.T. This is
the first year that the Consortium has been ...

This report contains the results of work completed during the eleventh year of the
Borehole Acoustics and Logging Consortium in the Earth Resources Laboratory at
M.LT. We continued our trend toward more general borehole ...

This report contains the results of work completed during the sixth year of the Full
Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at M.LT.
Over the last six years, our work have evolved from ...

This report contains the results of work completed during the seventh year of the
Full Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at
M.LT. During the past year, we have been concentrating on ...

This report contains the results of work completed during the eighth year of the Full
Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at M.I.T.
During the past year, we were able to accomplish many ...

This report describes work performed by the Reservoir Delineation Consortium during
the past year. We have made progress in the areas of theoretical analysis of wave propagation, data analysis, and significant field work ...

The measurements of fracture parameters, such as fracture orientation, fracture density and fracture compliance, in a reservoir is very important for field development and exploration. Traditional seismic methods for ...

We are developing a finite element program for oil and gas reservoir simulation based on Biot's poroelastic theory, where a simultaneous solution is sought for both the pore pressure and strain in the solid phase. Several ...

We propose using the forward propagated source wave to create synthetic receiver data on the surfaces of the computational domain where real receiver data is not available as a means of exploiting known information about ...

The measurements of fracture parameters, such as fracture orientation, fracture density and fracture compliance, in a reservoir is very important for field development and exploration. Traditional seismic methods for ...